facebook com missing from login page URL

Question

I am not able to login using FB in any of the applications. usually the URL should be

https://www.facebook.com/login.php?skip_api_login=1&api_key=XXX....

But in my case :

https://www./login.php?skip_api_login=1&api_key=XXX.. (without "facebook.com")

Here's the code :

<?php

require 'facebook.php';


$facebook = new Facebook(array(
  'appId'  => '137737616434442',
  'secret' => 'XXX',
  'baseurl' => 'http://localhost/facebookconnect/login/example.php',
));


$user = $facebook->getUser();

if ($user) {
  try {

    $user_profile = $facebook->api('/me');
  } catch (FacebookApiException $e) {
    error_log($e);
    $user = null;
  }
}


if ($user) {

  $logoutUrl = $facebook->getLogoutUrl(array( 'next' => 'http://localhost/facebookconnect/login/example.php' ));
  session_destroy();  
} else {
  $loginUrl = $facebook->getLoginUrl(array(
  'scope' => 'email,user_birthday,friends_birthday,publish_stream,user_location,friends_location,user_work_history,user_likes,friends_work_history,user_about_me,friends_about_me,user_hometown',
  'redirect_uri' => 'http://localhost/facebookconnect/login/example.php'));

}


$naitik = $facebook->api('/naitik');

?>

I tried this basic Facebook code but it didn't work. Can someone help me with this issue?